Caller ID for
Area code 610
Area code 610 Allentown, Pennsylvania
Area code 610 is in Pennsylvania, with numbers assigned in Allentown, Reading, Bethlehem and 56 more places. It’s 12:13 AM there now.
- State
- Pennsylvania15 area codes in Pennsylvania
- Time zone
- Eastern12:13 AM there now
- Exchanges
- 78259 places
- Overlay
- 484 and 835Same area, 10-digit dialing
- No sign-up
- We never contact the number
- Spam risk included
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Where area code 610 is
Numbers in 610 are assigned to 59 places in 13 counties: Lehigh County, Berks County, Chester County, Northampton County, Montgomery County, Carbon County, plus 7 more.
No single place dominates: Allentown, the largest, has 9% of the exchanges.
- Allentown71
- Reading58
- Bethlehem32
- West Chester23
- Easton14
- Pottstown13
- Exton10
- Collegeville9
- Catasauqua8
- Phoenixville8
- Centerport7
- Coatesville7
- Emmaus7
- Northampton6
- Avondale6
- Kennett Square6
- Slatington5
- Downingtown5
- Kutztown5
- Nazareth5
- Birdsboro5
- Royersford5
- Morgantown4
- Boyertown4
Phone companies in 610
782 blocks of numbers in 610 are held by 37 phone companies. The most belong to Verizon (322), Verizon Business (74) and AT&T Mobility (56).
A mix: about 19% wireless, 49% local phone and cable and 32% other carriers, including internet phone services.
A block’s holder is the company it was first assigned to; numbers can move to other carriers since.
History and overlays
610 went into service in 1994, added to the area of 215.
484 (since 1999) and 835 (since 2022) share the same area, so a new number there can get any of these codes and local calls are dialed with all 10 digits.
9 new exchanges were assigned since 2021, the latest in February 2026.
Calling 610
It’s 12:13 AM Eastern time in 610 right now.
From elsewhere in the U.S., dial 1, 610 and the 7-digit number; inside the area, all 10 digits too.
Nearby area codes
Pennsylvania has 15 area codes: 215, 223, 267, 272, 412, 445, 484, 570, 582, 610, 717, 724, 814, 835 and 878.
- 267 · Philadelphia, PA · about 35 mi
- 445 · Philadelphia, PA · about 37 mi
- 215 · Philadelphia, PA · about 39 mi
- 856 · Camden, NJ · about 54 mi
- 717 · Harrisburg, PA · about 61 mi
- 272 · Williamsport, PA · about 61 mi
From the North American Numbering Plan Administrator’s area code and exchange records (10/22/2026) and U.S. Census place and county names. Places and companies are where number blocks were assigned, not where anyone lives or which carrier a number uses today.
Map of the 610 area code
Map of the 610 area code around Allentown, Reading and Bethlehem, Pennsylvania.
Cities on the map
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Questions about 610
Where is area code 610?
In Pennsylvania, covering Allentown, Reading and Bethlehem and other places across 13 counties.
What time zone is 610 in?
Eastern time. It was 12:13 AM there when this page loaded.
Is 610 an overlay?
Yes. 484 and 835 serve the same area, so dial all 10 digits for local calls.
Which phone companies have 610 numbers?
37 companies hold blocks; the most belong to Verizon, Verizon Business and AT&T Mobility. About 19% of blocks are wireless.
Is 610 running out of numbers?
Not on record. 9 new exchanges have been assigned since 2021.